Traveling  grate



W. LLOYD.

TRAVELING GRATE.

APPLICATION FILED MAY7.19I8. I

Patented Feb. 8, 1921.

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WILLIAM LLoYn, or naznn'ron, rnnnsvtvnnra, assrenon r0 GOXE TRAVELING a snare COMPANY, or rear cannon, PENNSYLVANIA, A CORPORATION or PENN-f sYLvenI fipplication filed May 7,

To all w/aomit may concern:

Be it known that I, WILLIAM LLOYD, a citizen of the United States of America, residing at llazleton, in the county of Imzerne and State of Pennsylvania, have 1nvented certain new and useful Improvements in Traveling Grates, of. which the following is a specification. f

My invention relates to traveling grates and particularly to grates of the type comprising transverse grate bars supported at each end by endless chains, the object of my invention being to provide an improved de vice for fastening the grate bars 'to thechains in such manner that they may be readily attached and detached for repairs or replacement during the operation of the grate.

In the accompanying drawing, I Figure 1 is a plan of portion of the grate partly broken away; Fig. 2 is a broken cross section thereof; Fig. 3 is a side elevation, partially in section; I

Fig. 4: is a cross section and Fig. 5 is a longitudinal section through portion of a fastening device of modified construction;

Figs. 6 and 7 are similar views of a further modification; and

Fig. 8 is a. partial side elevation of the bar pin alone. I

In the operation of traveling grates of the automatic stokertype, it is not infrequently necessary to repair or replace a gratebar or the fuel-supporting keys carried thereby, and it is highly desirable that the mounting of the grate bars on the supporting chains shall be such that the bars can be quickly detached from the chains as they round the sprocket at the end of theirreturn travel. The present invention provides meansaccessibl'e wholly from the outer sides of the grate, by which the connecting means between the grate bars and the supporting chains may be readily disengaged to free the grate bar from the chain and permit its re.

moval for repairs or quick replacement by a perfect bar while the grate is in motion. It is thus unnecessary to interrupt the oper ation of the furnace.

In the accompanying drawing I have shown grate bar of the general type used in the Coxe grates, and comprlslng a central, depressed web portlon 10 terminating 1n end TnAvE rivG GRATE.

.1918. Serial No: 233,106.

blocks 11, whichfoverlie andfrest uponi the supporting cl'iains. Ihaveomitted from the drawing the dovetail rib carried by thefweb 10 and the grate barkeys'mounted on the rib; and extending betweentheendblocks 11, since they do not enter'into the subject atter of the present invention. 2 Each end block ll is'provided with depending lug Specification of Letters Patent. i f Paignted FQbgS, 1821; i

holesin the sides of the link and lugf-In order to reinforce the linkatthe hearing I point of the pin'l i, each inernberotthe link is provided with a boss or hub 15 -15 In the present construetiom'theseveral holes in thelug 12 and links 13 are plain, and the pin 14: passes freely into inserted -position; In order to hold it against escape, the en larged head end of thepin is grooved at'16,

while the hub 15* of the outer side member of the link is pierced horizontally to receive asoft metal lock pin 17, which, in inserted position, engages the channel 16 in the head end of the bar pin; By offsetting the ends of this look pin 17, its accidental escape from the hub 15.1s prevented, while, at the same time, it is readily straightenedat one end" and driven out when it is desiredto "remove the bar pin. 14-. as the lock pin 17 is driven out, the bar pin 14 may be withdrawn and the grate bar lifted from the chain.

It is obviousthat as soon In Figs. 4 and 5, I have shown a modified construction'in which the bar pin is connected to the chain by a bayonetslot joint.

i To this end, the hub 18' of the outer link member is provided with a stud 19 which projects into the bore of the hub. To permit the bar pin 20 toenter into full engagement with the link, its enlarged head end is lon gitudinally slottedat 21 and circumteren- I tially channeled at 22. On the, insertion of the pin 20, the slot 21 must beibrought into i register with the stud 19, which then slides through the slot into the channel 22. In

order to prevent the bar pin'frorn accidental escape, it is then turned through an tangle-" of 90 and a cross pin 23 driven through a" through an angle of 90 to bring its slot 21 into register With the stud l9, and then pull ing the bar pin 25; With a projecting stud 26 and correspondingly channeling the hub 2'? of the outer link 13 to permit the stud 26'to pass all the. way therethrough, or as far as an internal grooveQS out in the inner face thereof, the latter form being preferable inasmuch as it protectsthe pin 26 against Wear or injury by the depending 'lug 12. After the stud 26'has been passed through into the circumferential channel 28 and ro tated through an angle of 90, the cross pm 23 may be inserted and engaged in the groove 24, as in the previous construction, thus holding the bar pin against accidental escape. V V

The several constructions shown are of particular advantage in that they require that, under operating conditions, the threads may become rusted together and the unscrewing of thebar pm thereby rendered dlflicult. Various other means for accomplishing the same result will 'readily occur to those skilled in the art which do not, however, depart from what I claim as my invention.

I claim:

1. In a traveling grate, a chain having a hub link, a grate bar having a lug engaging said hub link, said lug and link being pierced in register at the hub of the link,

together with a bar pin v passed freelythrough the hub of said link and chain lug from the outer side of the chain, andmeans engaging the hub of the. link and freely accessible from the outer side of the chain for holding the bar pin in engaging position,

2. In a cha-in grate, a supporting chain having a link provided on its outer side face With a projection, a grate bar having a nepending lug associated With said link, a bar pin freely piercing said link and lug from the outer side of the grate to secure the bar to the chain, together with a locking pin freely engaging said bar pin and projection and readily insertible and removable from said outer side of the grate to hold the bar pin against escape.

In testimony whereof I have signed my name to this specification.

\VILLIAM LLOYD. 

